Centrifugal machine for treating metal articles coated by immersion



April 30, 1929 HQFER 1,711,389

CENTRIFUGAL MACHINE FOR TREATING METAL ARTICLES COATED BY IMMERSION Filed Nov. 30, 1926 2 Sheets-Sheet l mI Evfor zmmp April 30, 1929. H. HOFER 1,711,389

CENTRIFUGAL MACHINE FOR TREATING METAL ARTICLES COATED BY IIIIERSION Filed Nov. 30, 1926 2 Sheets-Sheet 2 Patented Apr, 30,1929.

UNITED STATES, PATENT OFFICE;

HANS HOFER, OF ZUG, SWITZERLAND, ASSIGNOR T0 VERZINKER'EI ZUG A. G., OF ZUG,

I SWITZERLAND.

CENTRIFUGAL MACHINE IMMERSION.

TREATING METAL ARTICLES COATED BY Application filed November 30, 1926, Serial No. 151,817, and in Great Britain September 23, 1926.

This invention is an improvement in and relating to centrifugal machines of the type having an electric motor, a shaft driven by this motor and a container for receiving metal articles coated by immersion and to be freed from superfluous coating metal by the action of the centrifugal force, the said container being capable of being driven by the said shaft.

According to thepresent invention the arrangement is such that the shaft which is driven by the electro-motor can be turned by hand as well.

In the accompanying drawing a constructional example of the invention is shown:

Figure 1 being a vertical section through the lower part of the centrifugal machine;

, Figure 2 an axial horizontal section through the arrangement for, driving the centrifugal machine by hand, and

Figure 3 a diagrammatic view of the latter.

1 is an electro-motor mounted on the vertical shaft 12, 2 is a casing surrounding the motor, 6 a brake for the motor shaft, 13 the driving basket mounted on the upper end of the motor shaft and adapted tosupport a perforated container for receiving metal articles coated by immersion and to be freed from superfluous coating metal by the ac tion of the centrifugal force. 7 is a protective hood which is suspended from a rope provided with a counterpoise.

On the shaft 12 a bevel wheel 3 is fixed, which meshes with a bevelwheel 1 fixed on a horizontal shaft 5, (Figs. 2 and At the outer end of the shaft 5 a spur wheel 8 is fixed, which meshes with internal teeth 17 on a hand wheel 9. The wheel 9 is mounted looselyon the eccentric part 10 of a stub shaft 11 which is nounted so as to be capable of turning in an extension 14 of'the casing 2, but which can be fixed by means of a screw 18.

A cap nut 16 which is screwed on to a threaded part of the stub shaft 11 prevents dash lines in Fig. 2).

In the former case the motor shaft 12 can be driven by means of the hand wheel. I In the second case,the hand wheel remains stationary, even when the motor 1 is runnmg.

F or turning the ournal 10 a key not shown may for instance be used, the key being adapted for engagement with two diametrically opposite holes 16 on the'external side of the nut 16. For limiting the rotary motion of the journal. 10 a screw 15 is provided, the inner end of which extends into a circumferential groove in the stub shaft 11 and acts as a stop for the latter when being turned.

VVhat I claim is limits, a shaft connecting said internal toothed wheel with a gearing which connects this shaftwith the driving shaft.

In testimony whereof I have afiixed my signature. 

